How to use custom data attributes and hooks in HTML

What to know about custom data attributes and hooks in HTML

Data attributes help you attach metadata to HTML elements without changing layout or semantics. This chapter explains the concept, demonstrates a practical example, and gives you a guided exercise.

How to use custom data attributes and hooks in HTML

Choose elements for their meaning, nest them in a clear document structure, and use descriptive attributes. Check that links and forms work with a keyboard and that images have useful alternative text.

Example: custom data attributes and hooks in HTML

Use this example as a starting point. Identify the part that controls the result, then adapt it to your own page or project.

<button data-role="primary" data-product="laptop">Buy now</button>

Common questions about custom data attributes and hooks

When should I use custom data attributes and hooks?

Use this technique when it expresses the structure, styling, or behavior your page needs. Keep the implementation focused and test it with the surrounding content.

What should I practice next?

Build a small profile page using a heading, paragraph, image with alt text, a link, and a semantic main element.